Investigation: the customer reported that an 80 year old patient with breast cancer underwent a coronary artery bypass surgery and afterward developed a bilateral pneumothorax while connected to an oasis drain (p/n 3600-100).The report says the doctor wondered if a defect with the drain could be responsible, but does not allege any specific defect or malfunction.Follow-up questions were asked, including whether there was a specific malfunction the customer was concerned with and they answered there was not.The customer's answers indicated the drain was functioning properly.The customer did not provide pictures or a lot number and they indicated that the drain will not be returned.A medical assessment was completed for this complaint which states that pneumothorax is one of the most common complications with the type of procedure this patient had and it is an anticipated occurrence.It points out that because the air leak ceased when the patient's right subclavian central line was removed, that was likely the source of the leak.It concluded that the pneumothorax was likely due to multiple factors and the drain was not the sole contributing factor.A dhr review could not be completed because a lot number was not provided.A device finished good specification review was completed and no changes to the design were identified which are related to this complaint.The ifu provides adequate instructions for the setup and use of the device.No changes are needed to the ifu.Complaint trending found that the actual occurrence level did not exceed the anticipated occurrence level.No excursions were identified.A complaint history review was completed which found no similar complaints.A review of crs/capas found none related to this complaint.Because the device was not returned and no images or any other evidence of the incident was provided, this complaint cannot be confirmed.A device nonconformity cannot be confirmed with the provided information or with the information reviewed in this investigation.No device nonconformance was alleged by the complaint and information provided by the customer about the patient's procedure indicated that the likely cause of the pneumothorax was another device, as discussed in the medical assessment.The medical assessment also discusses that a pneumothorax is a common and anticipated occurrence with this type of procedure, particularly with a frail patient.The root-cause of this complaint is user - anticipated procedural complication.H3 other text: device not available for return.
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